I have an Arca Swiss Monoball Z1 DP with the panning head ABOVE the ball - allowing you to keep the camera perfectly level even if you need to rotate the camera to adjust your composition. Also very useful for panoramic stitching. The DP essentially acts like a 'leveling' tripod... I'd be lost without it

It has some interesting design features - like levers and other controls that are each of different shape and position, so you can tell by feel which one you have contact with.

Matt

“Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”

Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2

I had a Gitzo 1228 for years and loved it. You need a medium sized ballhead for that tripod. I use an Arca-Swiss Z1 on a Gitzo 3-series systematic and it's wonderful but too big for the 1228. Markins make a range of A-S copies and their Q10 is perfect for it. Markins heads are well designed and engineered and beautifully finished. You might also want to look at the Acratech Ultimate, Arca-Swiss P0, and RRS BH-40, all great heads.

I use it on my Mannfrotto 055 and it supports my Sinar Norma 5X7".
It might not be up to the most strict tolerances and will "set" a tiny bit when tightening the knop. Untill now that hasn't been an issue for me.
Best regards